In this co-authored blog, Victoria Simms and Jennifer Hanratty consider a recent systematic review, which aimed to assess the effectiveness of the introduction of smoke-free legislation on child health outcomes.

André Tomlin and Douglas Badenoch voice a note of caution about the Lancet Psychiatry meta-analysis of cannabis use in young people. The study links cannabis use in children with low educational attainment, cannabis dependence, illicit drug use and suicide attempts in later life.